Messages in this thread | | | Date | Sat, 30 Mar 2002 21:04:26 -0500 (EST) | From | Alexander Viro <> | Subject | Re: linux-2.5.7 |
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On Sun, 31 Mar 2002, Keith Owens wrote:
> On Sun, 31 Mar 2002 09:48:38 +1000 (EST), > Neil Brown <neilb@cse.unsw.edu.au> wrote: > >I cannot see the weak aliases being a real fix either. > >If you compile with NFSD as a module, and with CONFIG_KMOD, then the > >nfssvc_ctl systemcall is suppose to auto-load nfsd.o. How can this be > >achieved with weak aliases? > > System calls cannot be in modules. Linus forbids it (that way lies > "extend and embrace") and at least two architectures (ia64, ppc64) > break when a syscall is in a module.
Yup. The logics being:
if we have neither CONFIG_NFSD nor CONFIG_NFSD_MODULE sys_nfsservctl() is alias for sys_ni_syscall() else sys_nfsservctl() is defined in fs/nfsct.c and does do_kern_mount() with type "nfsd", which triggers autoload if nfsd is modular. Whether nfsd is modular or comipled-in, syscall itself is in kernel (and is nothing but a wrapper for write()/read()).
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